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ACH550-UH User’s Manual
Diagnostics
Flashing green – alarms
For less severe errors, called alarms, the diagnostic display is advisory. For these
situations, the drive is simply reporting that it had detected something “unusual.” In
these situations, the drive:
•
Flashes the green LED on the drive (does not apply to alarms that arise from
control panel operation errors).
•
Sets an appropriate bit in an Alarm Word parameter (0308 or 0309). See
on page
for the bit definitions.
•
Overrides the control panel display with the display of an alarm code and/or
name.
Alarm messages disappear from the control panel display after a few seconds. The
message returns periodically as long as the alarm condition exists.
Correcting faults
The recommended corrective action for faults is:
•
Use the
table below to find and address the root cause of the
problem.
•
Reset the drive. See
on page
Fault listing
Fault
Code
Fault Name In
Panel
Description and Recommended Corrective Action
1
OVERCURRENT
Output current is excessive. Check for and correct:
• Excessive motor load.
• Insufficient acceleration time (parameters 2202
ACCELER
TIME
1 and
2205
ACCELER
TIME
2).
• Faulty motor, motor cables or connections.
2
DC
OVERVOLT
Intermediate circuit DC voltage is excessive. Check for and correct:
• Static or transient overvoltages in the input power supply.
• Insufficient deceleration time (parameters 2203
DECELER
TIME
1 and
2206
DECELER
TIME
2).
• Verify that overvoltage controller is ON (using parameter 2005).
3
DEV
OVERTEMP
Drive heatsink is overheated. Temperature is at or above limit.
R1…R4 & R7/R8: 115 °C (239 °F)
R5/R6: 125 °C (257 °F)
Check for and correct:
• Fan failure.
• Obstructions in the air flow.
• Dirt or dust coating on the heat sink.
• Excessive ambient temperature.
• Excessive motor load.
4
SHORT
CIRC
Fault current. Check for and correct:
• A short-circuit in the motor cable(s) or motor.
• Supply disturbances.
Summary of Contents for ACH550-UH HVAC
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Page 8: ...1 8 ACH550 UH User s Manual Table of contents ...
Page 32: ...1 32 ACH550 UH User s Manual Installation ...
Page 66: ...1 66 ACH550 UH User s Manual Application macros ...
Page 186: ...1 186 ACH550 UH User s Manual Parameters ...
Page 333: ...ACH550 UH User s Manual 1 333 Technical data ...